搭载在月球探测器上的中子探测器就发现在特定的地区中子的辐射量减少，而这也许表明月表上可能会有液态水或氢气的存在。
A neutron detector aboard the lunar orbiter found a decrease in neutron radiation that could represent either water or hydrogen in certain areas.
这种再处理工艺，或甚至快速中子反应堆不使用水来缓和裂变，及比他们消耗量创造更多的燃料，仍是一个遥远的前景。
Such reprocessing-or even fast-neutron reactors that don't use water to moderate fission and can potentially create more fuel than they consume-remain a distant prospect.
在反应堆物理设计和分析时，经常要进行微扰计算，以快速分析堆芯中子截面扰动下反应性的变化量。
Perturbation calculation will be required to rapidly determine the changes of reactivity caused by core neutron cross sections perturbation in reactor physics design and analysis.
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